參數(shù)資料
型號(hào): MT90221
廠商: Mitel Networks Corporation
英文描述: Quad IMA/UNI PHY Device(四端口 IMA/UNI 物理層設(shè)備(四端口ATM IMA和UNI處理器))
中文描述: 四IMA的/單向物理層設(shè)備(IMA的四端口/單向物理層設(shè)備(四端口自動(dòng)柜員機(jī)IMA的和單向處理器))
文件頁數(shù): 85/116頁
文件大小: 309K
代理商: MT90221
MT90221
77
8.0 Application Notes
Inverse Multiplexing for ATM (IMA) divides a high-
bandwidth stream of ATM cells in a round-robin
fashion and sends them over grouped T1/E1 lines in
a logical connection (on public or private networks)
and recombines the cells to recover the original high-
bandwidth stream at the receiving end. MITEL’s
MT90221 is ideally suited to implement the IMA
function.
8.1
Connecting the MT90221 to Various T1/E1
Framers
Many off-the-shelf T1/E1 framers require the
generation of a 1.544 MHz (T1) or 2.048 MHz (E1)
transmit clock reference signal at an input pin. The
MT9042 can generate both these clocks and the ST-
BUS back-plane signals (C4,F0). Figure 19 provides
an example of PCM Modes 2 and 4 in an IMA
implementation using existing T1/E1 framers and a
common 2 Mbps ST-Bus backplane.
New generation MITEL framers only require the ST-
BUS 4.096 MHz (C4) clock and a Frame Pulse (F0i)
at the transmit interface. An internal PLL generates
the required 1.544 MHz (T1) or 2.048 MHz (E1)
transmit clock. Figure 20 provides an example of
PCM Modes 2 and 4 in an IMA implementation
based on the MITEL MT90221 and the MITEL
MT9074 framers. This configuration supports CTC
mode. Although the MT9074 use the ST-Bus format
but it is not configured as a common backplane.
Figure 21 exemplifies PCM Modes 2 and 4 in an IMA
implementation supporting the asynchronous link
operation mode. Each T1 or E1 framer uses
independent clock and synchronization signals which
corresponds to ITC mode.
Figure 22 exemplifies PCM Modes 1 and 3 in an IMA
implementation supporting the asynchronous link
operation mode. Each T1 or E1 framer uses
independent clock and synchronization signals.
相關(guān)PDF資料
PDF描述
MT90401 SONET/SDH System Synchronizer(SONET/SDH 系統(tǒng)同步裝置(由一個(gè)數(shù)字鎖相環(huán)組成))
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MT9041B T1/E1 System Synchronizer(T1/E1系統(tǒng)同步裝置(由一個(gè)數(shù)字鎖相環(huán)組成))
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MT90221AL 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Quad IMA/UNI PHY Device
MT90222 制造商:ZARLINK 制造商全稱:Zarlink Semiconductor Inc 功能描述:4/8/16 Port IMA/TC PHY Device
MT90222AG 制造商:Microsemi Corporation 功能描述:ATM IMA 40MBPS 2.5V 384BGA - Trays
MT90222AG2 制造商:Microsemi Corporation 功能描述:ATM IMA 40MBPS 2.5V 384BGA /BAKE/DRYPACK - Trays
MT90223AG 制造商:Microsemi Corporation 功能描述:ATM IMA 80MBPS 2.5V 384BGA - Trays